http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57680
gee jojelino at gmail dot com changed:
What|Removed |Added
Summary|deregister_frame_fn is set |[META-BUG][target]deregiste
|to invalid address in |r_frame_fn is set to
|cygming-crtbegin.c:__gcc_de |invalid address in
|register_frame due to |cygming-crtbegin.c:__gcc_de
|unknown reason. |register_frame due to
||unknown reason.
--- Comment #1 from gee jojelino at gmail dot com ---
bootstrap failed with faulting libgcc static library.
Dump of assembler code for function __gcc_deregister_frame:
0x00401160 +0: push %ebp
0x00401161 +1: mov%esp,%ebp
0x00401163 +3: sub$0x18,%esp
0x00401166 +6: movl $0x475000,(%esp)
0x0040116d +13:call *0x5a0480
0x00401173 +19:mov$0x46e010,%edx
= 0x00401178 +24:sub$0x4,%esp
0x0040117b +27:test %eax,%eax
0x0040117d +29:je 0x401195 __gcc_deregister_frame+53
0x0040117f +31:movl $0x475047,0x4(%esp)
0x00401187 +39:mov%eax,(%esp)
0x0040118a +42:call *0x5a0484
0x00401190 +48:sub$0x8,%esp
0x00401193 +51:mov%eax,%edx
0x00401195 +53:test %edx,%edx
0x00401197 +55:je 0x4011a2 __gcc_deregister_frame+66
0x00401199 +57:movl $0x591000,(%esp)
0x004011a0 +64:call *%edx
0x004011a2 +66:leave
0x004011a3 +67:ret
(gdb) i li *0x46e010
Line 185 of ../.././libgcc/unwind-dw2-fde.c
starts at address 0x46e00f __deregister_frame_info_bases+159
and ends at 0x46e020 __deregister_frame_info.
why cygming-crtbegin.c:154 set invalid function pointer address??? it should be
__deregister_frame_info
(gdb) x/i __deregister_frame_info
0x46e020 __deregister_frame_info:
jmp0x46df70 __deregister_frame_info_bases
i think gcc is corrupted in calculating function pointer address.
and the failed bootstrap was using gcc with following version.
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/libexec/gcc/i686-pc-cygwin/4.9.0/lto-wrapper.exe
Target: i686-pc-cygwin
Configured with: ./configure --config-cache --prefix=/usr
--disable-win32-registry --enable-threads=single
--enable-languages=c,c++,lto,fortran --with-win32-nlsapi=unicode --enable-tls
--disable-bootstrap --enable-shared --disable-sjlj-exceptions --enable-gomp
--enable-cloog-backend=isl LTLDFLAGS=-no-undefined
lt_cv_deplibs_check_method=pass_all : (reconfigured) ./configure --config-cache
--prefix=/usr --disable-win32-registry --enable-threads=win32
--with-win32-nlsapi=unicode --enable-tls --disable-bootstrap --enable-shared
--disable-sjlj-exceptions --enable-gomp --enable-cloog-backend=isl
LTLDFLAGS=-no-undefined lt_cv_deplibs_check_method=pass_all
--enable-languages=c,c++,fortran,lto --no-create --no-recursion
Thread model: single
gcc version 4.9.0 20130516 (experimental) (GCC)
